Abstract：
:Methylmalonic acidemia is an inherited metabolic disorder that leads to brain damage associated to the accumulation of methylmalonic acid (MMA) and impairment of energy metabolism. We demonstrate here that treatment with diazoxide, an agonist of mitochondrial ATP-sensitive K(+) channels (mitoK(ATP)), can prevent death promoted by treatment with MMA in PC12 cells and freshly prepared rat brain slices. This diazoxide effect was reversed by 5-hydroxydecanoate, a mitoK(ATP) antagonist, confirming it occurs due to the activity of this channel. Diazoxide was not capable of preventing inner membrane potential loss promoted by MMA and Ca(2+) in isolated mitochondria, indicating it does not directly prevent mitochondrial damage. Furthermore, diazoxide did not prevent respiratory inhibition in cells treated with MMA. Interestingly, we found that the mitochondrial inner membrane potential within intact cells treated with MMA was maintained in part by the reverse activity of ATP synthase (ATP hydrolysis) and that diazoxide prevented the formation of the membrane potential in the presence of MMA, in a manner sensitive to 5-hydroxydecanoate. Furthermore, the effects of diazoxide on cell survival after treatment with MMA were similar to those of ATP synthase inhibitor oligomycin and adenine nucleotide translocator inhibitor atractyloside. These results indicate that diazoxide prevents PC12 cell death promoted by MMA by decreasing mitochondrial ATP hydrolysis. These results uncover new potential neuroprotective effects of mitoK(ATP) agonists under situations in which oxidative phosphorylation is inhibited.
journal_name
Exp Neuroljournal_title
Experimental neurologyauthors
Kowaltowski AJ,Maciel EN,Fornazari M,Castilho RFdoi
10.1016/j.expneurol.2006.04.004subject
Has Abstractpub_date
2006-09-01 00:00:00pages
165-71issue
1eissn
0014-4886issn
1090-2430pii
S0014-4886(06)00250-0journal_volume
201pub_type
杂志文章abstract：:The effects of D-Ala2-Met5-enkephalinamide (DAME) upon the hissing component of hypothalamically elicited affective defense behavior in the cat were examined in this study. Microinjections of DAME placed into the nucleus accumbens significantly suppressed this response in a dose and time dependent manner. This dose de...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/0014-4886(89)90008-3
更新日期：1989-04-01 00:00:00
abstract：:Abnormally associated movements inevitably occur after surgical repair of the facial nerve. The reason for this postparalytic syndrome is poor navigation of regrowing axons. Despite the valuable functional advantage provided by the easily detected movement of vibrissae in rats, the major investigative tools for establ...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1006/exnr.2002.8040
更新日期：2002-12-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2005.09.002
更新日期：2006-01-01 00:00:00
abstract：:Blood brain barrier (BBB) hyperpermeability and brain edema contribute to increased seizure susceptibility and brain injury in status epilepticus (SE). The endothelial glycocalyx is the coating on luminal side of the endothelium and can be considered as the first barrier of BBB. Currently, little is known about the ef...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2020.113320
更新日期：2020-08-01 00:00:00
abstract：:The release of reactive oxygen species (ROS) by neutrophils, which infiltrate the region of damage following spinal cord injury (SCI), was investigated to determine if such release is significant following spinal cord injury. The relationship of extracellular levels of hydroxyl radicals and hydrogen peroxide obtained ...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2004.05.046
更新日期：2004-12-01 00:00:00
abstract：:Ghrelin has been shown to regulate neurogenesis in the hippocampus. The aim of this study was to investigate the possible influence of ghrelin on cell proliferation and neuroblast formation in the subventricular zone (SVZ) and rostral migratory system (RMS) and generation of interneurons in the olfactory bulb (OB). We...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2013.11.021
更新日期：2014-02-01 00:00:00
abstract：:Granule cell (GC) neurogenesis increases following seizures, and some newborn GCs develop in abnormal locations within the hilus. These ectopic GCs (EGCs) display robust spontaneous and evoked excitatory activity. However, the pattern of afferent input they receive has not been fully defined. This study used electron ...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2005.08.007
更新日期：2005-12-01 00:00:00
abstract：:We have analyzed a mouse model of Charcot-Marie-Tooth disease 2E (CMT2E) harboring a heterozygous p.Asn98Ser (p.N98S) Nefl mutation, whose human counterpart results in a severe, early-onset neuropathy. Behavioral, electrophysiological, and pathological analyses were done on separate cohorts of NeflN98S/+ mutant mice a...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2018.06.010
更新日期：2018-10-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/0014-4886(85)90215-8
更新日期：1985-02-01 00:00:00
abstract：:Infant rats were subjected to pentylenetetrazol-induced convulsions on alternate days from 5 to 13 days of age. At 17 days of age, their susceptibility to the convulsant effects of hyperthermia was examined. It was found that previous pentylenetetrazol-induced convulsions caused a significant facilitation in the devel...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/0014-4886(83)90398-9
更新日期：1983-01-01 00:00:00
abstract：:Serial diffusion tensor imaging scans were collected at baseline and 1 year follow-up to investigate the neurodegenerative profile of white matter (WM) in seven individuals with the Huntington's Disease (HD) gene mutation and seven control subjects matched on age and gender. In the HD subjects, but not controls, a sig...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2008.12.026
更新日期：2009-04-01 00:00:00
abstract：:The psychopathological impact of emotional stress on a specific individual varies markedly: while most escape the development of post-traumatic stress disorder and/or major depression, a select group of individuals demonstrate a vulnerability to succumb to these conditions. The past decade has witnessed an explosion i...
journal_title：Experimental neurology
pub_type： 杂志文章,评审
doi：10.1016/j.expneurol.2014.05.012
更新日期：2014-11-01 00:00:00
abstract：:A significant proportion of neurologic patients suffer electroencephalographic (EEG) seizures in the acute phase following traumatic or ischemic brain injury, including many without overt behavioral manifestations. Although such nonconvulsive seizures may exacerbate neuropathological processes, they have received limi...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/s0014-4886(02)00013-4
更新日期：2003-02-01 00:00:00
abstract：:The effect of frequency potentiation on the postsynaptic potential in granule cells was studied stimulating the perforant path in curarized and urethanized rats. At stimulation frequencies between 2.0-5.0 Hz, synaptic efficacy in eliciting an orthodromic action potential increased despite the hyperpolarization of the ...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/0014-4886(91)90148-6
更新日期：1991-07-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/0014-4886(88)90009-x
更新日期：1988-08-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1006/exnr.2000.7614
更新日期：2001-07-01 00:00:00
abstract：:c-fos expression in response to noxious mechanical stimulation of the peripheral receptive field was used to study the somatotopic representation of the oral mucous membrane and trigeminal cutaneous receptive fields in the trigeminal subnucleus caudalis and the cervical spinal dorsal horn. Fos-neurons (neurons with c-...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1006/exnr.1994.1167
更新日期：1994-10-01 00:00:00
abstract：:When adrenal medullary cells are cultured in vitro, tyrosine hydroxylase (TH) mRNA, preproenkephalin (PPEnk) mRNA, and methionine enkephalin (Mek) immunoreactivity was markedly increased compared with intact adrenal medullary cells in situ, suggesting an increased biosynthesis of catecholamines and enkephalin-containi...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1006/exnr.1999.7267
更新日期：2000-01-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1006/exnr.2000.7379
更新日期：2000-06-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/0014-4886(83)90155-3
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journal_title：Experimental neurology
pub_type： 杂志文章
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/s0014-4886(05)80012-3
更新日期：1990-07-01 00:00:00
abstract：:An electron microscope study of 2- and 8-week-old normal and dystrophic chickens compared sarcomere lengths in relaxed and passively extended Patagialis (PAT) muscles. Sarcomeres were measured in dystrophic muscles only in fibers which exhibited no morphological signs of degeneration. Sarcomere lengths were not differ...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/0014-4886(88)90005-2
更新日期：1988-08-01 00:00:00
abstract：:In order to test the functional implication of herpes simplex virus (HSV) vector-mediated gene transfer after axonal injury, we injected replication-incompetent HSV vectors coding for the anti-apoptotic peptide Bcl-2 and the glial cell-derived neurotrophic factor (GDNF), separately or in combination into ventral spina...
journal_title：Experimental neurology
pub_type： 杂志文章
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更新日期：2003-12-01 00:00:00
abstract：:This study examined the effect of experimental diabetes on the anterograde and retrograde axonal transport of phosphofructokinase activity. Rats with streptozotocin-induced diabetes of 4 weeks duration showed phosphofructokinase activity accumulation deficits both proximal (53% and 65% in two separate experiments) and...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/0014-4886(87)90180-4
更新日期：1987-04-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1006/exnr.1997.6497
更新日期：1997-07-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2011.12.006
更新日期：2012-02-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/0014-4886(91)90092-q
更新日期：1991-10-01 00:00:00
abstract：:In the peripheral nervous system, regeneration of motor and sensory axons into chronically denervated distal nerve segments is impaired compared to regeneration into acutely denervated nerves. In order to find possible causes for this phenomenon we examined the changes in the expression pattern of the glial cell-line-...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1006/exnr.2001.7826
更新日期：2002-01-01 00:00:00
abstract：:Intracerebral transplants of ventral mesencephalic (VM) tissue have been well characterized. VM grafts contain numerous tyrosine hydroxylase immunoreactive neurons which send axons into the host brain. Transplanted neurons in VM grafts develop normally in that they contain tyrosine hydroxylase and GAP43. An overlooked...
journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1006/exnr.1994.1144
更新日期：1994-09-01 00:00:00
